17/10/2017 · You need to know not only what was mined in the quarry originally but also, and possibly more importantly, what it was mined from, the "country rock" as it's called in geochemistry. If you were for example mining Titanium then it's likely that the country rock is granite and there is likely to be Radium in the rocks, the water will be mildly radioactive and have dissolved radioactive Radon gas.
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